Simple-compound locomotive.



G. F. WIESECKEL.

SIMPLE COMPOUND LOCOMOTIVE.

APPucAnoN nuzo ma. 20. 1917:

W 9 mw w W mm f, w 0

G. F. WIESECKEL. SIMPLE COMPOUN) LOCOMOTIYE.

G. F. WIESEKEL.

SHVIPLE COMPOUND LOGOMO'TIVE.

'APPLVxcAnoN mam nas. 20, mi. 1917 3 sHETs-sHEET 3.

Patented Aug. 21,

.,. Vafter, is the feature of MED nA'GERsToWN, MARYLAND.

SIMPLE-COMEOUND LOCOMOTIVE.

specification of Letters Patent. Penfjd Aug. 21, 1917.

Application iiiea rebruai- 20, 1917r.., seriai'no. 148,802.

To all w/wm it mag] camera: i

Be it known that I, GEORGE F. WiEsiionnL,

a citizen of the United States, and resident of Hagerstowii, Maryland,have invented certain new and useful Improvements iii Simple-GompoundLocomotives, of which the :following is a specification.

The invention is an i'inproy'emeiit .in that type of locomotive knownthe, Mallet capable of Operating either preventing damage to the steamdistribution valve of the low pressure cylinder when the engine which, oin ordinary practice is due (lriftiiig, tothe lodgment of dust, ciiidersand combus-` tioii productsiii thesteain chest of said cylinder becauseof the Isuction action of the low` pressure piston drawing the foreignVFig.` 2 is a horizontal sectional view ofV the intercepting valve inposition for the operation of the locomotive under the simple system. yy

Fig. 3 isasimilar view of saidinterceptmg valve 111 position foroompound operao tion of the locoinotive.

Fig. 3a is a sideyiew of the intercept` iiig; valve casing.`

Fig. 4, is a planyiewlof thechecltvalve oasing` and associated parts; n,

Fig. 5 is a sectioiial View o f the checkcas- 111g and associated parts.

In i Operating thelocomotire under the simple system steam from the domeVA passes through the throttle B, dry pipe O, header D, superheater Eand to the steam pipeiF, thence to `the chest l;Gr of piston Valve H,Vwhich controls the steam supply to the pressure cylinder `From thiscylinder the steam exhausts through the end of ,the

ohest G, thence thip'ouh the casing` J' of the interoepting Valve J, andthrough the emer-, i

gency or separate exhaust pipe KNpast check` valve L, which ascwill bepointed out herem-l i F through the .br

(',eptingvalve cha-mber, this Valve being,` in` under the simple isystem or the compound system, 5my object `vbeing to provide means formeans i at the check valve,

my iniprovejinent, to i the eniergencyor separate eXhaust M con-`sistiiig of a shell or casing surroundinglthe main exhaust N and fromhere the blows up through the stacl: O.

Live steam under passesfrom the simplell position from whence it passesas orric, ,i

GEoRGE FRANK WIESEGKEL, ormennsrown, MARYLAND, AssIGNon or ONE-HALE `'roHARRY R. WRNOCK, or i exhaust full looilei'` pressure also i l'iighpressure steam pipe` anch plpe toV the interi;

will be nioi'e partieulai'ly described hereinafter,rdiiteot to thereceiver pipe Q, steam i Ghost-R, slide valve S, the low' pressure cylinder T and exhaust V. This system of steam distribution is old and wellknown,

and except for the check valve L and asso-` ciated parts, describedlater, the elements desci'ibed have beeiiiii use prior to niyiiiventioii.

Dui-ing vtlie time that the locomotive is 'Operating under the simplesystem, the ino tercepting Valve J is in the position shown in Fig. 2,vhaving been-moved into this position by, the engineer setting the valve'(not shown) in the cab to supply. steam through the pipe l to theChamber 2, where it acts on al piston 2' and forces the interceptingValve to its seat 3, as shown in Fig. 2, a

This -permits the exhaust fromV the high z pressure cylindei's to passby way of the passages to the VValve casing as shown 'by the full'arrowsvto the'sepalrateor einerg'ency eXhaust pipe K, which directs itto the stack. The check valve Lis lield open during this time, for thefree passage of the eXhaust,-

the function of which will be i by steam pressure,'delivered toVcontrolling` being delivfered throughfthe pipe l, which is an extensionof branch of the pipe l.:

this steam supply o o Thesteam Vdelivered through the branch pipe Pinlto the casing of the passesout through the discharge 11 of theintercelting valve casing into the receivei'i ited, i direct lto the'ie'ylmder. Thel pipe Q, and, as' before Steamfzhaf ef 'the :Pit

I intercepting yf valve enters Vthemchainber 5 aiid passes ``1n``general course of the steam just described from plpe P to.. the receiverpipe Q is indicated by the dotted arrows in Figi.Y 2.

Oompoimd system.

When' the engineer desires to operate the locom'otive under the compoundsystem, instead of under the simple system, he manipulates the *simplevalve in the cab to releasefthegsteam pressure from pipe 1 and i thepistn chamber)J vof'v the intercepting valve mechanism and also from thepipe 1*. As a result of releasing pressure from chamberV 2the'intercepting valve will leave its seat' 3 and seat itself at 3x,thus closing the communication between the high pressure which Vascepting valve is seated at 3, because of the release of pressure fromthe' Chamber 2 and because of the pressure of spring 12.

During o operation under the compound system the intercepting valve Jwill remain closed, 'as shown in Fig. 3, on its seat 3 and steamexhausting from the high pressure ;release of pressurey from thecylinder will be delivered to the low pressure cylinder T;

If the engineer now allows the locomotive to drift, by cutting off steamat the throttle,

a suction will be created in the emergency exhaust pipe K, under thepractice existing prior to my invention, and dust, cinders andcombusti'on products which have collected in ,this pipe during thecompound working will "be drawn through the intercepting valve casing,pipe Q to the steam chest of the low pressure cylinder,- resulting inCutting of the valves'and valve seat of the low pressure cylinders,

which effect is auginented by the` fact that the dust, cinders, `&c,,absorb the lub'ricant. To,V prevent this drawing back into'the' systemof the dust, &c., from the stack' the check valveL is provided. This isopen during operation under the simple operation Vis changedV to thecompound systemfthis check valve closes the emergency exha'us't pipe K,this closing being due to the 4 pipe 1`which ``takesjplace at thesametime that pressure valve is. 'allowed created by the piston isreleased,from pipe 1 and the intercepting to set itself in the compound positionof Fig. 3.

vIt will be understood that the suction.

of the 10W pressureV cylinder, while Hdrifting, produces suction ,o inthe emergency. exhaust pipe, under prior practice, notwithstanding thefact that the intercepting valve J' is closed on its seat 3 because thisvalve being held under spring pressure will open and close'as the lowpressure piston reciprocates.

It will be observed further that the check valve is set in closedlposition at the time the system isl changed by the en gineer fromsimple to compound working but it is not called upon to prevent backpressure in the exhaust pipe K until the engineer cuts off steam at thethrottle and allows the engine to drift.

The collection of dustin the emergency exhaust pipe during the compoundworking of the system is due to the fact that the discharge of steamthrough the main eX- haust N is sufliiciently strong to suck up cindersVwhich have collected at the bottom of the chamber in which the eXhaustis located and some of these cinders being drawn to the annular spacebetween the main and emergency exhausts N and M will be deposited in theemergency exhaust pipe, and then when the engine is drifting, if nocheck valve were present, this collection of dust and cinders would bedrawn back through the intercepting valve and the pipe Q to the valvecasing of the low pressure cylinder due to the suction created by thelow pressure piston. Itmay be asked why cinders will not pass backthrough the main eXhaust pipe V, but it will be noted that such actioncannot take place while the vengine is working either under the simpleor compound systems becausethe eXhaust steam is passing out through thispipe under both of 'these systems of working` and while the engine isdr'ifting any back suctioncreated through the said exhaust pipe V willnot be suflicient to lift cinders up from the bottom of the chamber inwhich the main exhaust N is located and hence no cinders will be drawndirectly into this pipe7 but the suction created by the low pressurepistonin drifting would be sufiicient were the check valve L not presentto draw ,dust and cinders, which had collected in the emergency eX-haust pipe during compound working, back through the intercepting valveand the pipe Q, into the low pressure engine.

It willl be understood that with the check valve present cinders will.collect in the emergency eXhaust pipe beyond the check valve, that isbetween it and the emergency eXhaust M'but such einders and dustwill beblown out through the stack as soon as the operation of the engine undersimple working is resumed,

The check valve is in the form of a fiap valve pivotally mounted at 13in its casing and closing upon an inclined seat 13'. Its pivot shaft hasan arm 14 connected by a link or head 15 with the rod ofa piston 16 ina' cylinder 17', mounted on the casing. A spring 18 bearing on thepiston tends to throw the [valve onto its seattto close the emergencyexhaust pipe and the pipe' 1*' changi ng the gainst which the Suppliesthesteam pressure `'to the opposite side of the piston when the simpleValve m the cal) is set in simple position and thus the steam pressureacting'in opposition to the spring will throw the Valve to its openposition for operation under the simple system.

When steam is released from 'the pipe l for position of the intercepting'Valve for compou'nd working the steam pressure is simultaneouslyreleased from the pipe lx and thorefore from the cylinder 17 allowiugthe spring to close the valve and prerent suction hack therethrough`when steam is 'cut off at the th'rottle and the low pressure engineacts asa suction pump consequent upon the drifting of the engine.

An adjustahle stop is provided at 18 'check valve Strikes when it opens.This stop is screw-threaded and fits in a. screw-threaded openingextending at theproper inclination through the valve casing to suit the'incline of the Valve. The

` stop is held by a nut 19,. By` removing this stop then a suitableimplement may he intro-` duced through the lnchned opening to grind' theValve seat. i

Havin'g thus fully descrlbed my invention i what I claim is:

r der,

pressure cylinder, an` emergency exhaust eX- tendin' from the hio'hDressurec hnder and 2D b i. 7

1. A locomotiye engine comprising a high pressure cylmder, and a lowpressure cylinan exhaustvextending from the lowa connection to supplysteam from the high to the low pressure cylinder, means for i changingthe engine from a simple to a compound system of operation and means foriprcrenting' the low pressure pistonfrom drawing dustifrom` theemergency exhaust of the high pressure cylinder lnto the steam vchest ofsaid low pressure cylinder when the g, substantially as descrihed.locomotive engine comprising a high pressure cylinder,` and a lowpressure cylinder, an exhaust extending from the .low pressure cylinder,an emergency eX- haust extending fromV the high pressure cylinders, anda connection to supply steam from the high to the low pressure cylinder,means for changing the engine from a simple to a componnd system ofoperation and means for preventing the low pressure piston from drawingdust from the emergency exhaust of the high pressure cylinder into thesteam chest of said low pressure cylinder when the engine is, drifting,said means comprising a Valve in the said emergency exhaust from thehigh pressure cylinder.

3. A locomotive engine comprising a high pressure cylinder and a lowpressure cylinder, an exhaust extending from the low'pressure cylinder,an emergency exhaust extending from the high pressure cylinder, and aconnection to supply steam from the high to engine is driftin' the lowpressurecylinder, means for changing the engine from a simple'to acompound system of operation and means for preventing the low pressurepiston from drawing dust from the emergency cxhaust ofthe high pressurecylinder, and through the supply port of and into the steam chest ofsaid low pressure cylinder when the engine is drifting, said meanscomprising a valve in the emergency exhaust of the high pressurecylinder which is automatically operated for the simple operation of thelocomotive and automatically closed when the system is changed fromsimple to compound working, substantially as described.

4. A locomotive engine comprising a high pressure cylinder and a losTpressure cylinder, an exhaust extending from the low pressure cylinder,an emergency exhaust extending from the high pressure cylinder, and aconnection to supply steam from the high to the len1 pressure cylinder,means for changing the engine from a simple to a compound system ofoperation and means foi' prerenting the low pressure piston from drawingdust from the emergency exhaust ofl the hig i pressure cylinder andthrough the supply port of and into the steam chest of said low pressurecylinder when the engine is drifting, said means comprising a Valve inthesaid emergency exhaust of the high pressure cylinder, withcontrolling means therefor operated by steam pressure when the worl'cingof the locomotive'is changed from one system to the other.

A locomotivel engine comprising a high and a low pressure cylinder, aconnection for supplying steam from the eXhaust of the high to the lowpressure cylinder for compound working, an intercepting 'valvecontrolling said connection, means for supplying steam at full boilerpressure to the high pressure cylinder, and to the intercepting Valve tobe delivered therethrough to the low pressure cylinder for simpleworking, an emergency exhaust for the high pressure cylindercontrolledby said intercepting Valve, and automatically Operating meansfor closing said emergency eXh-aust, when the system is changed fromsimple to compound working to prevent suction created by the lowpressure piston when drifting from drawing cinders from said emergencyeXhaust into the steam chest of the low pressure cylinder, substantiallyas descrihed.

6. A locomotive engine comprising a high and a low pressure cylinder, aconnection for supplying steam from the exhaust of the high to the lowpressure cylinder for compound working, an intercepting Valvecontrolling' said connection, means for supplying steam at full boilerpressure to the high pressure cylinder, and to the intercepting valve tobe delirered therethrough to the low pressure cylinder for simpleworking,'an emergeney exhaust for the high pressure cylinder controlledby said intercepting Valve, and automatically Operating means closing`toward the said intercepting valve for closing` said emergenoy exhaust,when the system is changed from simple to compound working to preventsuction back through said emergency exhaust when the engine is drifting,said. intercepting,` valve being,` controlled by steam pressure from thesimple valve in the cab and said automatically Operating emergencyexhaust closer boing simultaneously Controlled by the same Steampressure, substantially as described.

7 lin combination and a low pressure cylinder with a connection betweenthem to deliver exhaust steam from the high to the low pressurecylinder, an intercepting Valve in said connection, an emergency eXhaustpipe for the high pressure cylinder controlled by said intercepting`valve to direct the exhaust steam to theV for the low pressure stack, asteam supply by the intercepting cylinder Controlled vvalve, a checkValve in the emergency eX- haust pipe closmg,` toward theintercepting`substan- Copies of this'patent may be obtained for in a locomotive, ahigh it during comi for thethigh pres- I five cents each, Washington, D.G."

sure cylinder Controlled by said intercepting valve to directthe exhauststeam to the stack, a steam supply for the low pressure cylindercontrolled by the intercepting valve, a check valve in the emergencyexhaust pipe olosing toward'the intercepting Valve, and means forcontrolling said check valve to open it during simple operation o-f thelocomotive and to close it during compound operation ofl the locomotive,the said check Valve Controlled means.` and intercepting valve being`operated by steam pressure simultaneously.

9. In combination a high pressure cylinder, a low pressure cylinder,exhaust pipes extending from each, running` to the stack, aninterceptingValve receiving` the exhaust from the high vpressure cylinder, a branchsteam supplypipe leading tothe intercepting` valve, a plpe leading fromthe intercepting Valve to the low pressure cylinder to supply eithersuperheated steam or exhaust steam thereto, a connection for settingsaid valve in either simple position for supplyi'ng superheated steam tothe low pressure cylinder or to compound position to supply exhauststeam ther'eto, and means operating simultaneously with said valve whenset in compound position for closing the exhaust of the' high pressurecylinder between the intercepting valve and the stack against thesuction from the low pressure cylinder when the engine is drifting,substantially as described. o

In testimony whereof, I aflix my signature;

GEORGE FRANK VIESECKEL.

by addressing the Commssioner of Patents.

